Fire derelict building Harlow
Update at 8am:
One crew from Saffron Walden is now at the scene dampening down. A fire investigation will take place today.
Update at 3.45am:
Crews continue to work hard and the fire is nearly out.
They are using an aerial ladder platform and a drone to deal with any hot spots.
Hertfordshire firefighters have left the incident and three of our crews remain on scene.
Essex Police have set up a cordon.
The roof of the building has collapsed.